Two new gadolinium coordination polymers, Gd(tci)(H2O)]·DMF·2H2O (1) and [Gd(bci)(H2O)]·2H2O(2) (H3tci = tri(2-carboxyethyl)isocyanurate, H3bci = bis(2-carboxyethyl)isocyanurate), have been synthesized under solvothermal conditions by the reaction of gadolinium nitrate and H3tci or H3bci with presence of DMF and H2O. 1 and 2 feature an interesting 3D metal–organic framework which contains infinite linear Gd-(µ-O)2-Gd chains in the structures. The carboxylate groups bridge two Gd(III) centers in µ2-carboxylato-κ1O: κ1O′ and µ2O;κ2O,O′ patterns for 1 and µ2O;κ2O,O′ fashion for 2. The magnetic studies indicate that there exist antiferromagnetic interactions in 1 and ferromagnetic interactions in 2. The best fittings to the experimental magnetic susceptibilities gave J = −0.015 cm−1, g = 1.98 for 1 and J = 0.055 cm−1, g = 1.98 for 2.
